Improvement in double-action pumps



Z A// f2/ 2 Sheets-Sheet 1. N. MARSHALL.

Double-Action Pump.

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2 Sheets-Sheet 2.

N. MARSHALL. Double-Action Pump.

No. 196,302. Patented Oct. 23,1877.

I www .s nrrnn S'rA'rns NATHANIEL MARSHALL, OF PLATTSBURG, NEW YORK, ASSIGNOR TO SMITH M. WEED, OF SAME PLACE.

IMPROVEMENTV IN DOUBLE-ACTION PUMPS.

Specification forming part of Letters Patent No. 196,302, dated October 23, 1877 application ilcd September 7, 1877.

To all whom t may concern:

Be it known that I, NATHANIEL MARsHALL, of Plattsburg, in the county of Clinton and State of New York, have invented certain new and useful Improvements in Pumps 5 and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the yaccompanying drawings, and to letters of reference marked thereon, which form a part of this specication Figure 1 is a vertical central section of my improved pump. Fig. 2 is a vertical central section of the pump-barrel at right angles to the section shown in Fig. l. Fig. 3 is a detail view of crank and head of piston-rod. Fig. 4isa section, on line x of Fig. 2, of upper head of piston E. Fig. 5 is a similar section, on line y y of Fig. 2, of lower head of piston E.

The same letter is used to mark the same part wherever itoccurs in the drawings.

The nature of my invention consists in the construction of a pump which will draw and ldischarge a continuous stream of water with onebarrel and onevalve-boxreceivingthewater 1n solid column through the center of the piston or valve box, dividing it between the two sides of the cylinder, uniting it again, and discharging it, through hose or spout, in a continuous stream, all in the manner hereinafter more specifically set forth.

In the drawings, A marks thewell or receptacle from which the water is to be pumped. Tis the tube connecting the well with the pinnpbarrel B, and V an ordinary check-valve, opening upward.

The pump-barrel B is shown bolted to a base, I, covering the top of the wellor reservoir. In it is inserted a piston or valve box, E, of peculiar construction, connecting, by hollow piston-rods P P', with the well below, and with the discharging-chamberD above. The piston E is provided with vertical strips of packing c c on its sides, by which the barrel B is divided into two semi-cylindrical compartments, communicating, through the valve-ports of the piston, with the hollow piston-rods P P. The piston E is provided with four ports, covered by the four valves F G J K, the upper valves,

Fl G, opening inward, and the lower ones, J K, opening outward, as shown in Fig. 2.

The upper end of the piston-rod P is connected with a cross-head, It, provided with a horizontal slot, j', which receives the friction wrist-pin d, projecting from the face of the crank-wheel Q. A winch, W, is fixed by a nut, X, to the outer end of the shaft Y of crank-wheel Q. The revolution of the winch WV imparts a vertical reciprocating motion to the piston E.

The upper segmental head vof the piston E (see Fig. 4) is cut away on the side opposite to the packing a, so as to form an opening upward water-way on that side of the barrel B, and the lower head (see Fig. 5) is cut away on the side opposite the packing b, to form a downward water-way on the other side of the barrel. This construction is clearly shown in Figs. 2, 4, and 5. By it the packed portion of the upper head prevents the water from passing upward on its side of the barrel, and the similar part of the lower head prevents the water from passing downward on the opposite side, so that in whichever direction the piston. is moving the water is forced to escape upward, through the ports of the valves F and G, into the pipe P and chamber D.

S, Fig. 1, marks a spout connected with the chamber D, and controlled by the cock C. M is a pipe projecting down into the same chamber, and opened and closed by cock L. This pipe is connected with a hose, H, and nozzle N, so that the pump can be used for throwing water, when desired, by opening cock L and closing cock 0.

The operation is as follows: Y When the pis` ton E rises, the water enters the tube T, and, passing up hollow piston-rod P and under valve K, lls one side of the barrelB. W'hen the piston descends, the water in the barrel is driven up through the port c of the valve F into piston-rod P and chamber D, and the water in T enters, under valve J, the other side of the pinnp-barrel. During the descent of the piston, valves K and G are closed by the iiuidpressure, andvalves J and F are open, shown in Fig. 2, where the course of the piston and of the water is indicated by the arrows. During the upward movement of the piston, valves K and Gr are open and F and J closed, and

during both movements, owing to t It Will be observed that, bythe of my peculiarlyeonstruoted pist pump barrel, the latter becomes diminishing friction, and effecting the original oost of the apparatus.

I claim- 1. The combination, with the pump-barrel B,

action of the piston-heads uponi is continuously rising from the w ing delivered into chamber D, u

driven through the spout S, when t or through the hose-pipe M, as mayk practically, into two pumps, acting in drawing and delivering Water f1 ervoir, the operation being thus ma ous, and a result is obtained byi single barrel and a sinele piston hitherto been attained by the use of and pistons, thus simplifying the oc of the compounc heads, side pao P', valves F G JV ing the same, substantially purpose speeiii 2. A puml rel, B, and one struetecl as le the barrel lm iston E, having segmental i; e e, hollow piston-rods E 1,and the deviee for operat constructed and operating er described, for the by means of one baror valve box, E, conand packed to divide y a continuous stream of Water is d liaust and force Constructed a In testimony my own invent in presence of Witnesses BENJ. NORTON, JoHN B. RILEY.

anvered, both the eX- oubl e-aeting, the Whole g es specified.

ai n the foregoing as E( he reto my signature QCeS i 'MARSHALL 

